Merge tag 'arm-smmu-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into arm/smmu

Arm SMMU updates for 6.10

- SMMUv2:
  * Support for fault debugging hardware on Qualcomm implementations
  * Re-land support for the ->domain_alloc_paging() callback

- SMMUv3:
  * Improve handling of MSI allocation failure
  * Drop support for the "disable_bypass" cmdline option
  * Major rework of the CD creation code, following on directly from the
    STE rework merged last time around.
  * Add unit tests for the new STE/CD manipulation logic

1 files changed, 69 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/iommu/qcom,tbu.yaml b/Documentation/devicetree/bindings/iommu/qcom,tbu.yaml
new file mode 100644
index 000000000000..82dfe935573e
--- /dev/null
+++ b/Documentation/devicetree/bindings/iommu/qcom,tbu.yaml
@@ -0,0 +1,69 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iommu/qcom,tbu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm TBU (Translation Buffer Unit)
+
+maintainers:
+  - Georgi Djakov <quic_c_gdjako@quicinc.com>
+
+description:
+  The Qualcomm SMMU500 implementation consists of TCU and TBU. The TBU contains
+  a Translation Lookaside Buffer (TLB) that caches page tables. TBUs provides
+  debug features to trace and trigger debug transactions. There are multiple TBU
+  instances with each client core.
+
+properties:
+  compatible:
+    enum:
+      - qcom,sc7280-tbu
+      - qcom,sdm845-tbu
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  interconnects:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  qcom,stream-id-range:
+    description: |
+      Phandle of a SMMU device and Stream ID range (address and size) that
+      is assigned by the TBU
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    items:
+      - items:
+          - description: phandle of a smmu node
+          - description: stream id base address
+          - description: stream id size
+
+required:
+  - compatible
+  - reg
+  - qcom,stream-id-range
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/qcom,gcc-sdm845.h>
+    #include <dt-bindings/interconnect/qcom,icc.h>
+    #include <dt-bindings/interconnect/qcom,sdm845.h>
+
+    tbu@150e1000 {
+        compatible = "qcom,sdm845-tbu";
+        reg = <0x150e1000 0x1000>;
+        clocks = <&gcc GCC_AGGRE_NOC_PCIE_TBU_CLK>;
+        interconnects = <&system_noc MASTER_GNOC_SNOC QCOM_ICC_TAG_ACTIVE_ONLY
+                         &config_noc SLAVE_IMEM_CFG QCOM_ICC_TAG_ACTIVE_ONLY>;
+        power-domains = <&gcc HLOS1_VOTE_AGGRE_NOC_MMU_PCIE_TBU_GDSC>;
+        qcom,stream-id-range = <&apps_smmu 0x1c00 0x400>;
+    };
+...